List of interstellar radio messages

This is a list of notable interstellar radio messages (IRMs) transmitted from Earth. Many of these were sent in the aim of searching for extra-terrestrial intelligence (SETI), and are often called 'active SETI' or 'METI' (Messages to Extra-Terrestrial Intelligence) projects.

This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources.

Notable transmissions

Stars to which messages were sent include:

Target	Distance (ly)	Sent	Expected Arrival	Message
Messier 13	25,000	16 November 1974	25974	Arecibo message
Altair	16.7	15 August 1983	2000	A Message to Altair (CALL to the COSMOS'83) [1][2]
16 Cyg A	69	24 May 1999	2068	Cosmic Call 1
15 Sge	57	30 June 1999	2056
?	67	30 June 1999	2066
Gl 777	52	1 July 1999	2051
?	68	29 August 2001	2069	Teen Age Message
47 UMa	46	3 September 2001	2047
37 Gem	56	3 September 2001	2057
?	57	3 September 2001	2058
?	51	4 September 2001	2052
?	57	4 September 2001	2058
Gliese 49	32	6 July 2003	2036	Cosmic Call 2
Gliese 208	37	6 July 2003	2040
55 Cnc	41	6 July 2003	2044
HD 10307	41	6 July 2003	2044
47 UMa	46	6 July 2003	2049
Polaris	433	4 February 2008	2439	Across the Universe
Gliese 581	20.3	9 October 2008	2029	A Message From Earth
Gliese 581	20.3	28 August 2009	2030	Hello From Earth
TZ Arietis	14.6	9 November 2009	2024	RuBisCo Stars (RuBisCO genetic sequence)[3]
Teegarden's Star	12.5	9 November 2009	2021
Kappa¹ Ceti	29.8	10 November 2009	2039
HIP 34511	140[4]	15 August 2012	2152	Wow! Signal Reply[5]
37 Gem (HIP 33277)	57[6]	15 August 2012	2069
HIP 43587	41[7]	15 August 2012	2053
Gliese 526	17.6	2013	2031	Lone Signal
Polaris	433	10 October 2016	2450	A Simple Response to an Elemental Message[8]
Luyten b	12.36	16 October 2017	2030	Sónar Calling GJ273b[9][10]
		14 May 2018	2031

Other projects

Some other projects include:

• Poetica Vaginal (1986)^[11][12]
• Discovery Channel Message (2005)^{[citation needed]}
• Craigslist Messages (2005)^[13][14]
• CNES Cosmic Connexion (2006)^[15]
• Doritos Advert (2008)^[16]
• Sent Forever^[17]
• Penguin UK^[18]

Whilst not an interstellar message, it is also worth mentioning The Morse Message (1962),^[19] which was sent to Venus.